jep106: use packed jedec manufacturer code

JEP106 encodes JEDEC-assigned manufacture code as:
a) a sequence of zero or more escape codes 0x7f;
b) an odd-parity bit of the next 7 bits;
c) 7 bits.

The same code is often represented as a single value composed by
the logical OR between:
- the number of escape codes in a), shifted left by 7 positions;
- the 7 bits in c).
This is the preferred packed representation used by this change.

Currently there are only two uses of JEP106 in openocd to get the
manufacturer name:
- to decode the JTAG IDCODE of each TAP, where the JEP106 code is
  already packed as in the preferred representation above in bits
  IDCODE[11:1];
- to decode the ARM CoreSight PIDR register, where the JEP106 code
  is split in 3 parts:
  = PIDR3[3:0], corresponding to bits [10:7] of the packed code;
  = PIDR2[2:0], corresponding to bits [6:4] of the packed code;
  = PIDR1[7:4], corresponding to bits [3:0] of the packed code.

Wrap the existing JEP106 decode function in a simpler API using
the packed code.
Simplify the callers by skipping the bit unpacking.
Change the manufacturer code in CoreSight table dap_partnums[] to
match the packed representation, by removing the always-one bit 7
erroneously taken from PIDR bit JEDEC and included in the former
table.

Change-Id: I63eb4da9e6801fab25e330f1f6b792d2fd619493
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6418
Tested-by: jenkins

src/helper/jep106.c

@@ -27,7 +27,7 @@ static const char * const jep106[][126] = {
 #include "jep106.inc"
 };
 
-const char *jep106_manufacturer(unsigned bank, unsigned id)
+const char *jep106_table_manufacturer(unsigned int bank, unsigned int id)
 {
 	if (id < 1 || id > 126) {
 		LOG_DEBUG("BUG: Caller passed out-of-range JEP106 ID!");

src/helper/jep106.h

@@ -27,6 +27,11 @@
  *         manufacturer associated with bank and id, or one of the strings
  *         "<invalid>" and "<unknown>".
  */
-const char *jep106_manufacturer(unsigned bank, unsigned id);
+const char *jep106_table_manufacturer(unsigned int bank, unsigned int id);
+
+static inline const char *jep106_manufacturer(unsigned int manufacturer)
+{
+	return jep106_table_manufacturer(manufacturer >> 7, manufacturer & 0x7f);
+}
 
 #endif /* OPENOCD_HELPER_JEP106_H */

src/jtag/core.c

@@ -1072,8 +1072,6 @@ void jtag_sleep(uint32_t us)
 
 #define JTAG_MAX_AUTO_TAPS 20
 
-#define EXTRACT_JEP106_BANK(X) (((X) & 0xf00) >> 8)
-#define EXTRACT_JEP106_ID(X)   (((X) & 0xfe) >> 1)
 #define EXTRACT_MFG(X)  (((X) & 0xffe) >> 1)
 #define EXTRACT_PART(X) (((X) & 0xffff000) >> 12)
 #define EXTRACT_VER(X)  (((X) & 0xf0000000) >> 28)
@@ -1141,7 +1139,7 @@ static void jtag_examine_chain_display(enum log_levels level, const char *msg,
 		name, msg,
 		(unsigned int)idcode,
 		(unsigned int)EXTRACT_MFG(idcode),
-		jep106_manufacturer(EXTRACT_JEP106_BANK(idcode), EXTRACT_JEP106_ID(idcode)),
+		jep106_manufacturer(EXTRACT_MFG(idcode)),
 		(unsigned int)EXTRACT_PART(idcode),
 		(unsigned int)EXTRACT_VER(idcode));
 }

src/target/arm_adi_v5.c

@@ -1123,7 +1123,7 @@ static int dap_read_part_id(struct adiv5_ap *ap, target_addr_t component_base, u
 
 #define ANY_ID 0x1000
 
-#define ARM_ID 0x4BB
+#define ARM_ID 0x23B
 
 static const struct {
 	uint16_t designer_id;
@@ -1216,22 +1216,22 @@ static const struct {
 	{ ARM_ID, 0xd07, "Cortex-A57 Debug",           "(Debug Unit)", },
 	{ ARM_ID, 0xd08, "Cortex-A72 Debug",           "(Debug Unit)", },
 	{ ARM_ID, 0xd0b, "Cortex-A76 Debug",           "(Debug Unit)", },
-	{ 0x097,  0x9af, "MSP432 ROM",                 "(ROM Table)" },
-	{ 0x09f,  0xcd0, "Atmel CPU with DSU",         "(CPU)" },
-	{ 0x0c1,  0x1db, "XMC4500 ROM",                "(ROM Table)" },
-	{ 0x0c1,  0x1df, "XMC4700/4800 ROM",           "(ROM Table)" },
-	{ 0x0c1,  0x1ed, "XMC1000 ROM",                "(ROM Table)" },
-	{ 0x0E5,  0x000, "SHARC+/Blackfin+",           "", },
-	{ 0x0F0,  0x440, "Qualcomm QDSS Component v1", "(Qualcomm Designed CoreSight Component v1)", },
-	{ 0x1bf,  0x100, "Brahma-B53 Debug",           "(Debug Unit)", },
-	{ 0x1bf,  0x9d3, "Brahma-B53 PMU",             "(Performance Monitor Unit)", },
-	{ 0x1bf,  0x4a1, "Brahma-B53 ROM",             "(ROM Table)", },
-	{ 0x1bf,  0x721, "Brahma-B53 ROM",             "(ROM Table)", },
-	{ 0x3eb,  0x181, "Tegra 186 ROM",              "(ROM Table)", },
-	{ 0x3eb,  0x202, "Denver ETM",                 "(Denver Embedded Trace)", },
-	{ 0x3eb,  0x211, "Tegra 210 ROM",              "(ROM Table)", },
-	{ 0x3eb,  0x302, "Denver Debug",               "(Debug Unit)", },
-	{ 0x3eb,  0x402, "Denver PMU",                 "(Performance Monitor Unit)", },
+	{ 0x017,  0x9af, "MSP432 ROM",                 "(ROM Table)" },
+	{ 0x01f,  0xcd0, "Atmel CPU with DSU",         "(CPU)" },
+	{ 0x041,  0x1db, "XMC4500 ROM",                "(ROM Table)" },
+	{ 0x041,  0x1df, "XMC4700/4800 ROM",           "(ROM Table)" },
+	{ 0x041,  0x1ed, "XMC1000 ROM",                "(ROM Table)" },
+	{ 0x065,  0x000, "SHARC+/Blackfin+",           "", },
+	{ 0x070,  0x440, "Qualcomm QDSS Component v1", "(Qualcomm Designed CoreSight Component v1)", },
+	{ 0x0bf,  0x100, "Brahma-B53 Debug",           "(Debug Unit)", },
+	{ 0x0bf,  0x9d3, "Brahma-B53 PMU",             "(Performance Monitor Unit)", },
+	{ 0x0bf,  0x4a1, "Brahma-B53 ROM",             "(ROM Table)", },
+	{ 0x0bf,  0x721, "Brahma-B53 ROM",             "(ROM Table)", },
+	{ 0x1eb,  0x181, "Tegra 186 ROM",              "(ROM Table)", },
+	{ 0x1eb,  0x202, "Denver ETM",                 "(Denver Embedded Trace)", },
+	{ 0x1eb,  0x211, "Tegra 210 ROM",              "(ROM Table)", },
+	{ 0x1eb,  0x302, "Denver Debug",               "(Debug Unit)", },
+	{ 0x1eb,  0x402, "Denver PMU",                 "(Performance Monitor Unit)", },
 	/* legacy comment: 0x113: what? */
 	{ ANY_ID, 0x120, "TI SDTI",                    "(System Debug Trace Interface)", }, /* from OMAP3 memmap */
 	{ ANY_ID, 0x343, "TI DAPCTL",                  "", }, /* from OMAP3 memmap */
@@ -1276,12 +1276,12 @@ static int dap_rom_display(struct command_invocation *cmd,
 
 	uint8_t class = (cid >> 12) & 0xf;
 	uint16_t part_num = pid & 0xfff;
-	uint16_t designer_id = ((pid >> 32) & 0xf) << 8 | ((pid >> 12) & 0xff);
+	uint16_t designer_id = ((pid >> 32) & 0xf) << 7 | ((pid >> 12) & 0x7f);
 
-	if (designer_id & 0x80) {
+	if (pid & 0x00080000) {
 		/* JEP106 code */
 		command_print(cmd, "\t\tDesigner is 0x%03" PRIx16 ", %s",
-				designer_id, jep106_manufacturer(designer_id >> 8, designer_id & 0x7f));
+				designer_id, jep106_manufacturer(designer_id));
 	} else {
 		/* Legacy ASCII ID, clear invalid bits */
 		designer_id &= 0x7f;